@JENGOSMonkey, @elbrant, @tanza, @Kembe, @eeeefarm, @helle-devi Thank you all for the kind words, it has not been easy but this does help. We actually got his ashes back today and the place did a fantastic job, came back with ceramic paw print and all. It will last bring final closure, he is home.
@helle-devi results confirmed what was suspected, IBD, for which we had already started his medications. I think it was just his time.